go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.19.0: WithHeaders

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0
Demonstrate these symbols/APIs:
  - go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:921fd916900278994ecfa800d44e93b32ae5bd628b5081c98ea3928082451be7","contract":["otlploghttp.WithHeaders returns a non-nil Option","otlploghttp.WithHeaders accepts empty and nil header maps without error","otlploghttp.WithHeaders attaches custom HTTP headers to outgoing OTLP log export requests"],"goal":"verify go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0"],"schemaVersion":1,"symbols":["go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0","symbols":["go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require (
	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.19.0
	go.opentelemetry.io/otel/log v0.19.0
	go.opentelemetry.io/otel/sdk/log v0.19.0
)

require (
	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/go-logr/logr v1.4.3 // indirect
	github.com/go-logr/stdr v1.2.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
	go.opentelemetry.io/otel v1.43.0 // indirect
	go.opentelemetry.io/otel/metric v1.43.0 // indirect
	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
	go.opentelemetry.io/otel/trace v1.43.0 // indirect
	go.opentelemetry.io/proto/otlp v1.10.0 // indirect
	golang.org/x/net v0.52.0 // indirect
	golang.org/x/sys v0.42.0 // indirect
	golang.org/x/text v0.35.0 // indirect
	google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/grpc v1.80.0 // indirect
	google.golang.org/protobuf v1.36.11 // indirect
)

github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 h1:HWRh5R2+9EifMyIHV7ZV+MIZqgz+PMpZ14Jynv3O2Zs=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0/go.mod h1:JfhWUomR1baixubs02l85lZYYOm7LV6om4ceouMv45c=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
go.opentelemetry.io/otel v1.43.0 h1:mYIM03dnh5zfN7HautFE4ieIig9amkNANT+xcVxAj9I=
go.opentelemetry.io/otel v1.43.0/go.mod h1:JuG+u74mvjvcm8vj8pI5XiHy1zDeoCS2LB1spIq7Ay0=
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.19.0 h1:HIBTQ3VO5aupLKjC90JgMqpezVXwFuq6Ryjn0/izoag=
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.19.0/go.mod h1:ji9vId85hMxqfvICA0Jt8JqEdrXaAkcpkI9HPXya0ro=
go.opentelemetry.io/otel/log v0.19.0 h1:KUZs/GOsw79TBBMfDWsXS+KZ4g2Ckzksd1ymzsIEbo4=
go.opentelemetry.io/otel/log v0.19.0/go.mod h1:5DQYeGmxVIr4n0/BcJvF4upsraHjg6vudJJpnkL6Ipk=
go.opentelemetry.io/otel/metric v1.43.0 h1:d7638QeInOnuwOONPp4JAOGfbCEpYb+K6DVWvdxGzgM=
go.opentelemetry.io/otel/metric v1.43.0/go.mod h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY=
go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg=
go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg=
go.opentelemetry.io/otel/sdk/log v0.19.0 h1:scYVLqT22D2gqXItnWiocLUKGH9yvkkeql5dBDiXyko=
go.opentelemetry.io/otel/sdk/log v0.19.0/go.mod h1:vFBowwXGLlW9AvpuF7bMgnNI95LiW10szrOdvzBHlAg=
go.opentelemetry.io/otel/sdk/log/logtest v0.19.0 h1:BEbF7ZBB6qQloV/Ub1+3NQoOUnVtcGkU3XX4Ws3GQfk=
go.opentelemetry.io/otel/sdk/log/logtest v0.19.0/go.mod h1:Lua81/3yM0wOmoHTokLj9y9ADeA02v1naRrVrkAZuKk=
go.opentelemetry.io/otel/sdk/metric v1.43.0 h1:S88dyqXjJkuBNLeMcVPRFXpRw2fuwdvfCGLEo89fDkw=
go.opentelemetry.io/otel/sdk/metric v1.43.0/go.mod h1:C/RJtwSEJ5hzTiUz5pXF1kILHStzb9zFlIEe85bhj6A=
go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A=
go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
go.opentelemetry.io/proto/otlp v1.10.0 h1:IQRWgT5srOCYfiWnpqUYz9CVmbO8bFmKcwYxpuCSL2g=
go.opentelemetry.io/proto/otlp v1.10.0/go.mod h1:/CV4QoCR/S9yaPj8utp3lvQPoqMtxXdzn7ozvvozVqk=
golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 h1:VPWxll4HlMw1Vs/qXtN7BvhZqsS9cdAittCNvVENElA=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:7QBABkRtR8z+TEnmXTqIqwJLlzrZKVfAUm7tY3yGv0M=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 h1:m8qni9SQFH0tJc1X0vmnpw/0t+AImlSvp30sEupozUg=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

package main

import (
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"time"

	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp"
	otellog "go.opentelemetry.io/otel/log"
	sdklog "go.opentelemetry.io/otel/sdk/log"
)

func main() {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Printf("Received request with X-Custom-Header: %s\n", r.Header.Get("X-Custom-Header"))
		w.WriteHeader(http.StatusOK)
	}))
	defer server.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	exporter, err := otlploghttp.New(
		ctx,
		otlploghttp.WithEndpointURL(server.URL),
		otlploghttp.WithInsecure(),
		otlploghttp.WithHeaders(map[string]string{
			"X-Custom-Header": "custom-value",
		}),
	)
	if err != nil {
		panic(err)
	}
	defer exporter.Shutdown(ctx)

	processor := sdklog.NewSimpleProcessor(exporter)
	provider := sdklog.NewLoggerProvider(sdklog.WithProcessor(processor))
	defer provider.Shutdown(ctx)

	logger := provider.Logger("example")
	var record otellog.Record
	record.SetBody(otellog.StringValue("example log message"))
	record.SetTimestamp(time.Now())
	logger.Emit(ctx, record)

	_ = provider.ForceFlush(ctx)
}

{
  "schemaVersion": 1,
  "goal": "verify go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp@v0.19.0"
  ],
  "symbols": [
    "go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp.WithHeaders"
  ]
}

package main

import (
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"os"
	"sync"
	"time"

	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp"
	otellog "go.opentelemetry.io/otel/log"
	sdklog "go.opentelemetry.io/otel/sdk/log"
)

func main() {
	// Assertion 1: otlploghttp.WithHeaders returns a non-nil Option
	opt := otlploghttp.WithHeaders(map[string]string{"key": "val"})
	if opt == nil {
		fmt.Fprintf(os.Stderr, "FAIL: otlploghttp.WithHeaders returned nil\n")
		os.Exit(1)
	}

	// Assertion 2: otlploghttp.WithHeaders accepts empty and nil maps without error
	{
		ctx := context.Background()
		expEmpty, err := otlploghttp.New(ctx, otlploghttp.WithInsecure(), otlploghttp.WithHeaders(map[string]string{}))
		if err != nil {
			fmt.Fprintf(os.Stderr, "FAIL: otlploghttp.New with empty headers failed: %v\n", err)
			os.Exit(1)
		}
		_ = expEmpty.Shutdown(ctx)

		expNil, err := otlploghttp.New(ctx, otlploghttp.WithInsecure(), otlploghttp.WithHeaders(nil))
		if err != nil {
			fmt.Fprintf(os.Stderr, "FAIL: otlploghttp.New with nil headers failed: %v\n", err)
			os.Exit(1)
		}
		_ = expNil.Shutdown(ctx)
	}

	// Assertion 3: otlploghttp.WithHeaders attaches specified custom HTTP headers to export requests
	{
		var (
			mu           sync.Mutex
			receivedReqs []*http.Request
		)

		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			mu.Lock()
			defer mu.Unlock()
			receivedReqs = append(receivedReqs, r.Clone(r.Context()))
			w.WriteHeader(http.StatusOK)
		}))
		defer server.Close()

		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
		defer cancel()

		headers := map[string]string{
			"X-Custom-Auth":   "secret-token",
			"X-Custom-Tenant": "tenant-abc-123",
		}

		exporter, err := otlploghttp.New(
			ctx,
			otlploghttp.WithEndpointURL(server.URL),
			otlploghttp.WithInsecure(),
			otlploghttp.WithHeaders(headers),
		)
		if err != nil {
			fmt.Fprintf(os.Stderr, "FAIL: otlploghttp.New failed: %v\n", err)
			os.Exit(1)
		}

		processor := sdklog.NewSimpleProcessor(exporter)
		provider := sdklog.NewLoggerProvider(sdklog.WithProcessor(processor))

		logger := provider.Logger("contract-logger")
		var record otellog.Record
		record.SetBody(otellog.StringValue("contract verification log"))
		record.SetTimestamp(time.Now())
		logger.Emit(ctx, record)

		if err := provider.ForceFlush(ctx); err != nil {
			fmt.Fprintf(os.Stderr, "FAIL: provider.ForceFlush failed: %v\n", err)
			os.Exit(1)
		}

		_ = provider.Shutdown(ctx)
		_ = exporter.Shutdown(ctx)

		mu.Lock()
		reqCount := len(receivedReqs)
		var firstReq *http.Request
		if reqCount > 0 {
			firstReq = receivedReqs[0]
		}
		mu.Unlock()

		if reqCount == 0 {
			fmt.Fprintf(os.Stderr, "FAIL: expected at least 1 HTTP request to receiver, got 0\n")
			os.Exit(1)
		}

		if got := firstReq.Header.Get("X-Custom-Auth"); got != "secret-token" {
			fmt.Fprintf(os.Stderr, "FAIL: expected X-Custom-Auth %q, got %q\n", "secret-token", got)
			os.Exit(1)
		}
		if got := firstReq.Header.Get("X-Custom-Tenant"); got != "tenant-abc-123" {
			fmt.Fprintf(os.Stderr, "FAIL: expected X-Custom-Tenant %q, got %q\n", "tenant-abc-123", got)
			os.Exit(1)
		}
	}

	fmt.Println("PASS: all contract assertions passed")
}